Man pages matching name yppasswd in section 1:

yppasswd.1.ja	debian 10 / manpages-ja
yppasswd.1.zh_CN	debian 10 / manpages-zh
yppasswd.1.zh_TW	debian 10 / manpages-zh
yppasswd.1.en	debian 10 / nis
yppasswd.1.ja	debian 11 / manpages-ja
yppasswd.1.zh_CN	debian 11 / manpages-zh
yppasswd.1.zh_TW	debian 11 / manpages-zh
yppasswd.1.en	debian 11 / yp-tools
yppasswd.1.ja	debian 12 / manpages-ja
yppasswd.1.zh_CN	debian 12 / manpages-zh
yppasswd.1.zh_TW	debian 12 / manpages-zh
yppasswd.1.en	debian 12 / yp-tools